The LMR12015/20 regulator is a monolithic, high frequency, PWM step-down DC-DC converter
in a 10-pin WSON package. It contains all the active functions to provide local DC-DC conversion
with fast transient response and accurate regulation in the smallest possible PCB area.
With a minimum of external components the LMR12015/20 is easy to use. The ability to
drive 1.5/2A loads respectively, with an internal 150 mΩ NMOS switch results in the best power
density available. The control circuitry allows for on-times as low as 65 ns, thus supporting
exceptionally high frequency conversion. Switching frequency is internally set to 2 MHz and
synchronizable from 1 to 2.35 MHz, which allows the use of extremely small surface mount inductors
and chip capacitors. Even though the operating frequency is very high, efficiencies up to 90% are
easy to achieve. External shutdown is included featuring an ultra-low shutdown current of 70 nA.
The LMR12015/20 utilizes peak current mode control and internal compensation to provide
high-performance regulation over a wide range of operating conditions. Additional features include
internal soft-start circuitry to reduce inrush current, pulse-by-pulse current limit, thermal
shutdown, and output over-voltage protection.
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